I'm stuck in one place and can't move in Pokémon Go

Once I was playing Pokémon Go while riding a bus. Suddenly the game froze - that sometimes happens. Later I opened a game and now it shows that I'm in that location where it has frozen previously. There's no "no GPS signal found" notification, and I can even catch Pokémon at that place.

I've checked my GPS through google maps - it shows me my true location.

(My device is SG S5 with custom ROM)

This may be due to server strain, when a lot of people are playing at the same time, the servers may not work properly again for everyone. If, even after restarting your phone, this continues, try again later. If it continues, there might be a bigger issue.